TY - JOUR
T1 - Microstructure and electromagnetic wave absorption properties of RGO-SiBCN composites via PDC technology
AU - Song, Chaokun
AU - Cheng, Laifei
AU - Liu, Yongsheng
AU - Zhao, Mingxi
AU - Ye, Fang
N1 - Publisher Copyright:
© 2018 Elsevier Ltd and Techna Group S.r.l.
PY - 2018/10/15
Y1 - 2018/10/15
N2 - Herein, we demonstrate the incorporation of graphene oxide (GO) into silicoboron carbonitride (SiBCN) ceramics by polymer derived ceramics (PDCs) technology to improve dielectric and electromagnetic wave absorption capacity. Different amounts of GO content and annealing temperatures are used to optimize the permittivity of fabricated composites. Results show that RGO-SiBCN composite, with 10 wt% GO, delivers excellent electromagnetic reflection coefficient (RC) of − 34.56 dB and effective electromagnetic absorption bandwidth (EAB) of 2.46 GHz in the X-band. Enhanced performance of RGO-SiBCN composite is mainly due to the conductive loss and polarization loss. Furthermore, high-temperature annealing (1700 °C) resulted in precipitation of SiC nanocrystals and formation of nanoscale interfaces. Hence, RC and EAB of SiBCN reached − 46.73 dB and 3.32 GHz, respectively. The present study provides novel insight into fabrication and EMW absorption performance of SiBCN-based composites. It is believed that SiBCN-based composite possess superior microwave absorption property and have great potential in a wide range of applications.
AB - Herein, we demonstrate the incorporation of graphene oxide (GO) into silicoboron carbonitride (SiBCN) ceramics by polymer derived ceramics (PDCs) technology to improve dielectric and electromagnetic wave absorption capacity. Different amounts of GO content and annealing temperatures are used to optimize the permittivity of fabricated composites. Results show that RGO-SiBCN composite, with 10 wt% GO, delivers excellent electromagnetic reflection coefficient (RC) of − 34.56 dB and effective electromagnetic absorption bandwidth (EAB) of 2.46 GHz in the X-band. Enhanced performance of RGO-SiBCN composite is mainly due to the conductive loss and polarization loss. Furthermore, high-temperature annealing (1700 °C) resulted in precipitation of SiC nanocrystals and formation of nanoscale interfaces. Hence, RC and EAB of SiBCN reached − 46.73 dB and 3.32 GHz, respectively. The present study provides novel insight into fabrication and EMW absorption performance of SiBCN-based composites. It is believed that SiBCN-based composite possess superior microwave absorption property and have great potential in a wide range of applications.
KW - B. Composites
KW - C. Dielectric property
KW - D. SiBCN
KW - E. Electromagnetic wave absorption properties
UR - http://www.scopus.com/inward/record.url?scp=85050297681&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2018.07.106
DO - 10.1016/j.ceramint.2018.07.106
M3 - 文章
AN - SCOPUS:85050297681
SN - 0272-8842
VL - 44
SP - 18759
EP - 18769
JO - Ceramics International
JF - Ceramics International
IS - 15
ER -